- Hey, It's That Voice!:
- Kenta Miyake as Norose is reprising his role as Rosenberg in El Cazador de la Bruja, except with scary teeth and a BFS.
- Akira Ishida as Fumio Takashi, a psychiatrist whom Takumi saw in the past for his perceived mental illness. Takashi is killed in the "Brainless" New Gen murder.
- Hiroyuki Yoshino as Takumi Nishijou. One Niconico Douga user went as far as splicing in Takumi's voice into a scene from Gundam00 where Hallelujah is first introduced (Allelujah gets Takumi's voice).